K9ZUT
| Joined: | Thu, Dec 31st 2015, 19:32 | Roles: | N/A | Moderates: | N/A |
Latest Topics
| Topic | Created | Posts | Views | Last Activity |
|---|---|---|---|---|
| Vertical Antenna Feed | Jul 16th 2016, 22:34 | 1 | 5,768 | on 16/7/16 |
| DX | Jul 7th 2016, 08:38 | 1 | 5,715 | on 7/7/16 |
| 6 Meter Full Wave Horizontal Loop Antenna | Jul 6th 2016, 23:55 | 2 | 5,504 | on 9/7/16 |
| (Stealth) Downspout Antenna Fed with 450 Ohm Ladder Line and a MFJ 901b Antenna Tuner | Jul 6th 2016, 00:25 | 1 | 6,529 | on 6/7/16 |
| (Stealth) Downspout Antenna Fed with 450 Ohm Ladder Line and a MFJ 901b Antenna Tuner | Jul 5th 2016, 23:58 | 1 | 6,441 | on 5/7/16 |
| Feeding a Vertical Antenna With Ladder Line | Jul 3rd 2016, 22:30 | 1 | 6,511 | on 3/7/16 |
Latest Posts
| Topic | Author | Posted On |
|---|---|---|
| Vertical Antenna Feed | K9ZUT | on 16/7/16 |
| I recommend feeding all vertical antennas with 450 Ohm ladder line because it eliminates the need for radials. I am currently using a MFJ-901B antenna tuner and MFJ-931 artificial ground. Radiation angle Is very low evidenced by DX worked. John Brocker, K9ZUT |
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| 6 Meter Full Wave Horizontal Loop Antenna | K9ZUT | on 9/7/16 |
| The loop was about 2' from the bed spring which affected the feed point impedance. | ||
| DX | K9ZUT | on 7/7/16 |
| Worked PJ2/W3HNK on 20 Meters last night! His QTH is Isle of Carousal in the UK. (Stealth downspout bottom fed with 450 Ohm ladder line) continues to out perform with a low angle of radiation. The downspout is 36' in height and the tuner is a MFJ-901b; the ground is a MFJ-931 artificial ground with a long and short counterpoise rolled up in the corner. The radio is a Yaesu FT 950 running 100W. Signal reports were "contest 59's". |
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| 6 Meter Full Wave Horizontal Loop Antenna | K9ZUT | on 6/7/16 |
| The Z is supposed to be 100 Ohms; with a 1/4 wave 72 Ohm matching transformer, 50 Ohms. But, VSWR is about 3:1 implying that Z is much higher or much lower. Can anyone please explain what is actually happening? |
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| (Stealth) Downspout Antenna Fed with 450 Ohm Ladder Line and a MFJ 901b Antenna Tuner | K9ZUT | on 6/7/16 |
| First contact was VE7SO on 20 meters, British Columbia with a "contest 5X9" He was 5X5. Also worked a W2 in New Hamoshire on 40 meters. Believe radiation angle to be very low. John Brocker, K9ZUT | ||
